A circular-shaped item designed to maintain predetermined distance between assembled parts and/or for distributing pressure or preventing endwise movement between member parts. It has a solid cross-section and two flat parallel bearing surfaces. The distance between the bearing surfaces perpendicular to the axis of the centrally located hole shall not exceed 25 percent of the outside diameter. The diameter of the centrally located hole must exceed 75 percent of the outside diameter. Excludes laminated items. For items manufactured from impregnated graphite or lubricated nonmetallic materials, excluding felt or plastics, see gasket. For items manufactured from lubricated plastics, see bearing, washer, thrust. For items manufactured from lubricated felt, see felt, mechanical, preformed. Excludes disk, valve; insulator washer; and shim. See also spacer, plate and spacer, sleeve.
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6130-01-406-6593
NSN 2925-01-499-4802
NSN 6135-01-010-0891
NSN 5985-01-072-5896
NSN 5960-00-402-9390
NSN 5925-01-423-3217
NSN 5925-01-504-4302
NSN 6220-01-367-3658
NSN 5945-00-619-3553
NSN 6150-01-072-7915
NSN 6645-01-035-3787
NSN 2925-01-381-5307